661562 has 8 divisors (see below), whose sum is σ = 1082592. Its totient is φ = 300700.

The previous prime is 661553. The next prime is 661603. The reversal of 661562 is 265166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661562.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15014 + ... + 15057.

It is an arithmetic number, because the mean of its divisors is an integer number (135324).

2⁶⁶¹⁵⁶² is an apocalyptic number.

661562 is a deficient number, since it is larger than the sum of its proper divisors (421030).

661562 is a wasteful number, since it uses less digits than its factorization.

661562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30084.

The product of its digits is 2160, while the sum is 26.

The square root of 661562 is about 813.3646168847. The cubic root of 661562 is about 87.1345081007.

The spelling of 661562 in words is "six hundred sixty-one thousand, five hundred sixty-two".